Flight number record
DL 377
Delta Air Lines · Anchorage to Minneapolis
- Route
- ANC → MSP
- Departs
- 21:15
- Flights
- 332
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 377, check with Delta Air Lines.
DL 377 lands a B+, 4 points better than the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about 2.4 hours on average. That rests on 332 flights, with a median arrival 10 minutes early.
Set against the rest of the country, DL 377's record is 4 points better than the US average of 77.3%. That gap is worth roughly 42 fewer late arrivals for every thousand flights.
Key figures
On time
81.5%
Arrivals under 15 minutes late, of 330 completed flights
Avg delay
142 min
Across delayed arrivals only, not all flights
Cancelled
0.60%
National rate is 1.89%
1 hour+ late
7.3%
National rate is 8.3%
These figures cover 332 flights between September 2025 and August 2026. The median arrival is 10 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When DL 377 flies
DL 377 flies ANC to MSP without a single fixed slot. Its most common scheduled departure was 21:15, used on 136 of 332 flights, with 21:45 (71 flights) next.
- Departs 21:15136 flights41.0%
- Departs 21:4571 flights21.4%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 21:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 377 runs 11 points better at 81.5%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 377 next to ANC to MSP
Every carrier on ANC to MSP combined arrived on time 82.8% of the time across 777 flights, so DL 377 is about level with it. Delta flew 706 flights on the same city pair under all its flight numbers, including this one, and those ran 81.4% on time. Across its whole network Delta Air Lines managed 81.1%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 377thin sample | 332 | 81.5% | 142 min | 0.60% | B+ |
| All Delta Air Lines on ANC–MSP | 706 | 81.4% | 122 min | 1.13% | B |
| All carriers on ANC–MSP | 777 | 82.8% | 120 min | 1.03% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 377 quarter by quarter
DL 377 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jul–Sep 2026 at 57.6%, a swing of 39 points on roughly 66 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights96.7%
- Oct–Dec 202588 flights86.4%
- Jan–Mar 202690 flights87.5%
- Apr–Jun 202691 flights74.7%
- Jul–Sep 202633 flights57.6%
Scale runs 50% to 100%.
By weekday, DL 377 ranged from 77.1% on Sunday to 87.5% on Wednesday. With about 47 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 377 runs when it is late
DL 377 often beats the schedule: 128 of 330 completed flights, 39%, arrived 15 minutes or more early. The 61 late arrivals split 15 under half an hour, 22 between 30 and 60 minutes, and 24 an hour or more.
- 15+ min early128 flights38.8%
- Within 15 min141 flights42.7%
- 15–29 min late15 flights4.5%
- 30–59 min late22 flights6.7%
- 1–2 hours late13 flights3.9%
- 2+ hours late11 flights3.3%
Scale runs 0% to 100%.
Share of 330 completed flights by arrival against schedule.
20 of 77 late departures made up the time and arrived on time, 26% of them. Only 4 left on time and still arrived late.
The worst days
Worst days for DL 377
The latest arrival of the period was on 18 May 2026, 14 hours 22 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 May 2026 | 14 hours 22 minutes | Carrier |
| 4 July 2026 | 14 hours 14 minutes | Carrier |
| 14 December 2025 | 14 hours 3 minutes | Late-arriving aircraft |
| 13 May 2026 | 13 hours 8 minutes | Carrier |
| 29 January 2026 | 12 hours 29 minutes | Carrier |
Delay causes
Why DL 377 runs late
Carrier accounts for 61% of the 8,680 delay minutes carriers reported here, and the remaining four split what is left.
- 61%Carrier
- 33%Late-arriving aircraft
- 4%National Airspace System
- 2%Extreme weather
The largest share of delay minutes, 61%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 5,307 of the 8,680 delay minutes reported here. The split is drawn from 8,680 delay minutes reported on DL 377.
Cancellations are rare at 0.60%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
7.3% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 2.4 hours, which a normal layover absorbs.
At 2,519 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
DL 377 is not only a ANC to MSP flight. It also flew MSP to ANC (273 flights, 64.9% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 332 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| MSP to ANCthin sample | 273 | 64.9% | 67 min | 0.37% | D+ |
What to do with this
Booking DL 377
For a booking, read DL 377 as 81.5% on time with 0.60% cancelled over 332 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ANC to MSP, every carrier and departure
- MSP to ANC, the return direction
- Delta Air Lines 447 on the same route85.6%
- Minneapolis-St Paul International (MSP) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.